A4tech HU-11 USB Mono Headset with Adjustable Headband for PC & Mac DESCRIPTION HU-11 Mono Headset DSP Stereo: Equipped with DSP (Digital Signal Processing) stereo chipset to reduce the unwanted background noise and offer clear, crisp audio performance. Single-Ear Wearing Style: Best for call center, business, video conference, conference calls, online class, etc. 40 mm Speaker Unit: The high-precision 40 mm unit deliver the accurate sound reproduction and hours of comfort listening. Noise Cancelling Unidirectional Mic: Reduces unwanted background noise for clear conversation. Tangle-free Cable: Sensitive and tangle-free cable provides durability. Soft Ear Cushions: Soft on-ear cushions ensure comfortable wearing for hours use. Specifications: Headset Speaker Unit: 40 mm Frequency Response: 20 Hz - 20 KHz Sensitivity: 100 db Impedance: 32 ohm Microphone Frequency Response: 100 Hz -10 KHz Sensitivity : - 42 dB Cable Cable Length: 200 cm Port: USB System Requirement: Windows 7 / 8 / 8.1 / 10 / Mac OS X
